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$188 Cheap Flights from Missoula (MSO) to San Diego (SAN)

View $188 flight on Thu, Nov 12, 2026Opens in a new window

Popular airlines from Missoula Intl. Airport (MSO) to San Diego Intl. Airport (SAN)

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Cheap Flights from Missoula to San Diego (MSO-SAN)

Prices were available within the past 7 days and start at $188 for one-way flights and $343 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Jan 23 - Fri, Jan 29
MSO
Missoula
SAN
San Diego
$343 Roundtrip, found 5 hours ago
$343
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Sat, Jan 23 from Missoula to San Diego, returning Fri, Jan 29, priced at $343 found 5 hours ago
Alaska Airlines
Mon, Nov 23 - Thu, Dec 3
MSO
Missoula
SAN
San Diego
$353 Roundtrip, just found
$353
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Nov 23 from Missoula to San Diego, returning Thu, Dec 3, priced at $353 just found
Alaska Airlines
Wed, Nov 11 - Sat, Nov 14
MSO
Missoula
SAN
San Diego
$359 Roundtrip, found 1 hour ago
$359
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Nov 11 from Missoula to San Diego, returning Sat, Nov 14, priced at $359 found 1 hour ago
Delta
Wed, Nov 11 - Sat, Nov 14
MSO
Missoula
SAN
San Diego
$364 Roundtrip, found 1 hour ago
$364
Roundtrip
found 1 hour ago
Select Delta flight, departing Wed, Nov 11 from Missoula to San Diego, returning Sat, Nov 14, priced at $364 found 1 hour ago
Alaska Airlines
Wed, Nov 11 - Sat, Nov 14
MSO
Missoula
SAN
San Diego
$364 Roundtrip, found 1 hour ago
$364
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Nov 11 from Missoula to San Diego, returning Sat, Nov 14, priced at $364 found 1 hour ago
Alaska Airlines
Thu, Dec 3 - Mon, Dec 7
MSO
Missoula
SAN
San Diego
$374 Roundtrip, found 4 days ago
$374
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Dec 3 from Missoula to San Diego, returning Mon, Dec 7, priced at $374 found 4 days ago
Alaska Airlines
Wed, Nov 11 - Sat, Nov 14
MSO
Missoula
SAN
San Diego
$376 Roundtrip, found 1 hour ago
$376
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Nov 11 from Missoula to San Diego, returning Sat, Nov 14, priced at $376 found 1 hour ago
Alaska Airlines
Thu, Nov 12 - Mon, Nov 16
MSO
Missoula
SAN
San Diego
$378 Roundtrip, found 4 days ago
$378
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Nov 12 from Missoula to San Diego, returning Mon, Nov 16, priced at $378 found 4 days ago
Alaska Airlines
Sat, Oct 24 - Mon, Nov 2
MSO
Missoula
SAN
San Diego
$380 Roundtrip, found 4 days ago
$380
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Missoula to San Diego, returning Mon, Nov 2, priced at $380 found 4 days ago
American Airlines
Sat, Nov 7 - Wed, Nov 11
MSO
Missoula
SAN
San Diego
$447 Roundtrip, found 14 hours ago
$447
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Sat, Nov 7 from Missoula to San Diego, returning Wed, Nov 11, priced at $447 found 14 hours ago

Alternative airports near San Diego

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Diego Intl. SAN. Cheapest and Closest option available. Average driving time to city center is 5 minutes. Flights from $554
SAN
San Diego Intl.
CheapestClosest
Average driving time to city center5 min
Flights from $554

What you need to know for your flight from Missoula Intl. to San Diego Intl.

Missoula (MSO) to San Diego (SAN) at a glance

Traveling from Missoula (MSO) to San Diego (SAN) offers a range of options with various airlines on this short flight. You can explore both full-service and budget-friendly carriers to discover the best itinerary that aligns with your budget and schedule. Whether you're seeking nonstop flights between Missoula and San Diego or looking to compare flight times, this guide will help you find the key details for your journey from Missoula International Airport to San Diego International Airport.

  • Fastest flight duration: around 3 hours non-stop
  • Route distance: roughly 1,000 miles (1,610 km)
  • Flights per week: around 11 departures on average
  • Typical fares (one-way): economy tickets often range from $130–$380, depending on seasonality and how far ahead you book

Flights from Missoula International Airport (MSO) to San Diego International Airport (SAN)

Based on the latest traveler bookings, here are the top airlines favored for flights from Missoula to San Diego, especially for non-stop and one-stop options. Common layover spots include Salt Lake City International Airport (SLC, approximately 45 minutes), Seattle-Tacoma International Airport (SEA, around 1 hour and 15 minutes), and Denver International Airport (DEN, roughly 1 hour and 45 minutes). This variety enables you to mix and match pricing, overall travel time, and cabin class to secure the best travel itinerary.

  • Delta: As a comprehensive airline, Delta provides one-stop service with one-way ticket prices generally falling between $130 and $365. It represents around 44% of flights on this route, featuring an in-flight duration of 4 hours and an overall travel time of about 5 hours and 30 minutes, including layovers.
  • Alaska Airlines: Offering both non-stop and one-stop options, Alaska Airlines features one-way fares that usually range from $145 to $510. This carrier accounts for nearly 32% of departures on this route, with a typical 1-stop flight lasting 4 hours and the total journey taking approximately 5 hours and 30 minutes.
  • United: Known for its one-stop service, United Airlines has one-way fares typically priced between $130 and $405. It handles about 20% of departures on this route, with an in-flight time of 4 hours and a complete journey duration of roughly 5 hours and 30 minutes, including layover times.
  • American Airlines: This full-service airline offers one-stop travel with one-way fares generally between $145 and $335. American Airlines makes up around 2% of departures on this route, featuring a flight time of 4 hours and an estimated total travel duration of 5 hours and 30 minutes, including layovers.
  • Frontier Airlines: A budget-friendly option, Frontier Airlines provides one-stop service with one-way fares typically ranging from $130 to $185. This carrier accounts for about 1% of departures on this route, with an in-flight time of 4 hours and a total travel time of approximately 5 hours and 30 minutes, including layovers.

Travelers flying from Missoula to San Diego can enhance their journey by upgrading to first class or business class with Alaska Airlines, offering superior seating and service on this route.

Best time to fly from Missoula (MSO) to San Diego (SAN)

The most popular months for travelers flying from Missoula to San Diego are January, February, and March, when peak temperatures in San Diego reach up to 58.1°F in March. If you prefer quieter travel, consider May, the least busy time to visit with temperatures around 62.6°F and typically the lowest average one-way fare (around $201). Flight availability peaks in July, with approximately 14 flights per week, making it easier to find convenient departure times.

  • Cheapest time to fly: May usually offers good deals with average one-way fare around $201, roughly 16% cheaper than the yearly average.
  • More budget-friendly months to fly: August and March typically offer average one-way fares roughly ranging from $205 to $220.
  • Most flight options: July has the highest number of flights from Missoula to San Diego, with approximately 14 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January57.4°F (14.1°C)High10$253
February56.8°F (13.8°C)High13$235
March58.1°F (14.5°C)High12$220
April60.6°F (15.9°C)Average11$248
May62.6°F (17.0°C)Low10$201
June66.4°F (19.1°C)Average11$231
July70.5°F (21.4°C)Average14$231
August72.3°F (22.4°C)Average11$205
September72.0°F (22.2°C)Average13$254
October68.2°F (20.1°C)Average12$227
November62.6°F (17.0°C)Low10$247
December57.4°F (14.1°C)Low10$327

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Missoula (MSO) to San Diego (SAN)

  • Missoula to Carlsbad (MSO-CLD): McClellan-Palomar Airport (CLD) is located approximately 28 miles from San Diego International Airport (SAN).

How to find the best prices for flights from Missoula (MSO) to San Diego (SAN)

Getting some of the best deals on flights from Missoula to San Diego is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually available when booking 2 to 8 weeks in advance, which coincides with when most travelers make their reservations. Evening departures from 6 PM to 12 AM often provide lower prices, although afternoon flights from 12 PM to 6 PM are more popular. Additionally, flying on Tuesday generally yields cheaper rates, while Thursday is the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find San Diego hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at San Diego International Airport from Missoula International Airport

San Diego welcomes travelers from Missoula with a range of transport options based on price, convenience, and proximity. Here's how to reach San Diego efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in San Diego, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from San Diego International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at San Diego International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From San Diego International Airport, the Seaport, a seaport, is located about 0.1 miles away on foot, making it easily accessible for travelers. For those using a car, Middletown Station, a metro station, is approximately 2.3 miles from the airport, while B Street Cruise Ship Terminal, a cruise terminal, is around 3 miles away, providing convenient options for further travel.

Frequently asked questions

How much does a flight from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) cost?
You can find cheap one-way flights from $188 and cheap return flights from $343 Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) with Expedia. One-way flights usually range from $186 to $997, and return flights typically cost between $342 and $1273. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The cheapest month to fly from MSO to SAN is January when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
Enter MSO to SAN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
Frontier Airlines is one of the cheapest airlines offering connecting flights from Missoula, MT (MSO) to San Diego, CA (SAN), starting from around $429. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
To find a cheap flight from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The earliest flight from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) usually departs at around 5:00 AM, operated by Delta. This seasonal service is active from January to April and December, giving you an early start to enjoy San Diego. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The most popular departure times for flights from Missoula, MT (MSO) to San Diego, CA (SAN) are in the early afternoon, from 12pm to 3pm. About 36% of passengers prefer this time window. Many major carriers, including Alaska Airlines and Delta Air Lines, offer flights during this window. This timing works well because it allows you to enjoy a leisurely morning in Missoula before heading to sunny San Diego.
How long does it take to fly from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
Flying from MSO to SAN with a connection usually takes about 6 hours 30 minutes, traveling roughly 994 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
First class is available on flights from MSO to SAN. First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines

How do I earn miles on a Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) flight with Expedia?
It's easy to earn miles on a Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Diego from Missoula Intl. (MSO)?
If you're planning to travel to San Diego from Missoula Intl. (MSO), you can fly into San Diego Intl. (SAN) Some flights may connect through major hubs like Denver Intl. (DEN), Seattle - Tacoma Intl. (SEA), Portland Intl. (PDX) before reaching San Diego. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) at the last minute?
Typically, booking a last minute flight from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) flight and hotel package?
Securing a Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) San Diego Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.)?
If you booked your Missoula, MT (MSO-Missoula Intl.) to San Diego, CA (SAN-San Diego Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Missoula Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$342
Distance
993 mi

Book with confidence

Missoula to San Diego Flights

The cheapest times to fly from Missoula to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Missoula to San Diego are during the month of January. You can find some of the cheapest flights from Missoula to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Missoula to San Diego

Sunday is one of the best days to book for cheap flights from Missoula to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Missoula to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Missoula to San Diego in 2026. You can also book with separate airlines for your outbound and return journeys, from $188 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Missoula to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Missoula to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Missoula to San Diego Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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